A cross-country skier leaves her home at noon. She skis for 90 minutes into the wind, and then decides to turn around and take the same route home. Now that the wind is at her back, her speed is 2 miles per hour faster going home than it was during the first part of the trip. She arrives home at 2:45. She wondered how far away she was when she decided to turn back.

Which of these systems of equations can you use to solve this problem?